Influence of nickel on the toughness of lean duplex stainless steel welds
2014 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, Vol. 602, 49-57 p.Article in journal (Refereed) Published
Three weldments with the nickel contents 13, 4.9 and 6.0 wt% were made from 30 mm LDX 2101((R)) plates. The weldments were subjected to tensile, impact and fracture toughness testing. The aim was to evaluate the susceptibility for brittle failure in the weld metal at sub-zero temperatures (degrees C). The amount of ferrite was higher for the 1.3 wt% nickel weldment compared to the other two which had similar phase composition and mean free ferrite distance. The result from the tensile testing showed that for the weldment with the highest nickel content the ductility remained unchanged with decreasing temperature while the other two weldments became less ductile with decreasing temperature. J-integral based fracture toughness testing showed a significant difference in the susceptibility for brittle failure with higher values for the weldment with 6 wt% nickel than for the others with lower nickel content.
Place, publisher, year, edition, pages
2014. Vol. 602, 49-57 p.
Duplex stainless steel, Weld metal, Impact toughness, Fracture toughness, Nickel
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-133675DOI: 10.1016/j.msea.2014.01.093ISI: 000335098500007ScopusID: 2-s2.0-84897808896OAI: oai:DiVA.org:kth-133675DiVA: diva2:662725
QC 20140604. Updated from submitted to published.2013-11-082013-11-082014-06-04Bibliographically approved